Grinder and sharpener attachment for meat grinders



Nov. 30, 1937. A. .1. KIRKLAND 2,100,808

GRINDER AND SHARPENER ATTACHMENT FOR MEAT GRINDERS Filed Dec. 14', 1936 INVENTOR.

4422M? z/ Air/Hana! 4622 Z22 2 TTORNEY.

Patented Nov. 30, 1937 UNETED STATES PATENT GEE! GRINDER AND SHARPENER ATTACHMENT 4 Claims.

My invention relates to knife grinding and sharpening means, and more particularly to a device which may be readily attached to the motor of a meat grinder, and it consists in the constructions, arrangements and combinations herein described and claimed.

It is an object of the invention to provide an attachment embodying a shaft having mounted thereon the necessary grinding and sharpening disks, as well as buffer disk, the shaft being constructed for quick and rigid attachment to the drive shaft of the motor.

It is also an object of the invention to provide an adjustable pedestal support for the shaft of the attachment, permitting its ready adjustment to various constructions of meat choppers or grinders.

It is a further object of the invention to provide a separable shaft, each section including one or more grinding or buffing elements, thereby making it possible to employ a single grinding element, if desired, or the entire number of elements may be rotated as a unit.

It is a still further object of the invention to provide a pedestal support having means attachable to one end of the grinder shaft and permitting swinging movement of the shaft to a position clear of the driving motor.

Additional objects, advantages and features of invention will be apparent from the following description considered in conjunction with the accompanying drawing, wherein Figure l is a side elevation of my invention as installed upon a meat chopper or grinder.

Figure 2 is a similar view showing a single emery wheel associated with the driving motor, and also showing the position of the other emery wheel and buffer when not in use.

Figure 3 is a fragmentary perspective view illustrating the iii-operativev positions of one of the emery wheels and buffer.

Figure 4 is a fragmentary sectional View of the pedestal and bearing for the shaft.

Figure 5 is an enlarged sectional View illustrating the bearing and shaft connection at the driving motor.

There is illustrated a base to which may be of any approved construction, at one end of which there is suitably mounted an electric motor H, employed ordinarily for driving a meatchopper or grinder (not shown). The motor I! includes a driven shaft i2 suitably journalled as at IS in a boss M of the motor casing. The shaft l2 stops short of the outer end of the boss and includes a transversely extended slot !5, receiving a tongue l6 of a grinder shaft H. The boss M as now constructed, has an annular recess l8, concentric with the shaft l2 and receives therein a bushing N3 of the shaft IT, as will now be fully described.

The shaft ii and shaft ll constitute the mounting means for the grinding disks, buffers, etc., the shafts being arranged in end to end relation, one end of the shaft ll being journalled in the boss H3 while the opposite end of the shaft I? is journalled in an adjustable pedestal 26.

The shaft I! has a pair of spaced washers 2i and .22, fixed thereto and interposed between these washers there is a sleeve bearing 23, the latter being journalled in the bushing it. The bushing 19 snugly fits within the recess l8 and is locked therein by a set screw 2%. Qbviously, the mounting of the shaft ll so as to mate the slot I 5 and tongue l5, rotation of the motor shaft l2 will cause rotation of the shaft ii and its associated grinding disk 25. The outer end of the shaft I! terminates in a tongue 26 adapted to interfit with a slot 2'! formed in the end of the shaft H, and preferably a sleeve 28 is disposed around the juncture of the shafts to maintain alignment and engagement of the slot and tongue.

The outer end of the shaft H is revolubly mounted in a bushing 29 journalled in a collar 30, the latter being fixed to a yoke 3! of the pedestal 20. The yoke 3! includes a pair of upstanding arms 32, each of which has a threaded aperture and receiving respective adjusting screws 33. The screws 33 engage in suitable countersunk bearings formed in the periphery of the collar, and as may be clearly seen in Figure 4, are in opposed relation. Thus, the shaft I? may be laterally adjusted by manipulation of the screws and locked in such position upon tightening of the lock nuts 34. This adjustment may be necessary in adapting the grinder attachment to certain makes of meat choppers, and in addition, the yoke 3| may be vertically adjustable, and this by reason of the fact that the stem 35 thereof may be moved upwardly and downwardly through the socket 36 of the pedestal. The stem 35 may be locked in adjusted positions by means of the screw 31, threadedly engaged in a boss 38 and impinging the stem.

The shaft H has secured thereon a buffer 39 and grinding disk 40 suitably spaced along the length of the shaft.

The use of the attachment will be readily understood from the following description. The meat chopper ordinarily associated with the motor II will be removed, exposing the recess l8 and shaft I2, and the collar and sleeve bearing l923 of the shaft H inserted therein, the tongue l6 entering the slot IS. The set screw 24 is now tightened, locking the bushing l9 within the recess. Thus with operation of the motor, the shaft i? will be driven, rotating the grinding disk 25. This position may be readily seen from consideration of Figure 2, and it will also be seen that the shaft 11 and associated buffer and grinding disk has been swung upon the adjusting pins 33 so as to clear the disk 25, the shaft ll resting upon an upright support 4| carried upon one of the base I9. The grinding disk 25 may thus be used for sharpening knives and tools of various kinds, and should a buffer or further grinding be required the motor will be stopped and the shaft i'l then swung'upon the adjusting pins 33 so that the shafts I! and I1 are in alignment allowing interlocking engagement between the tongue 26 and slot 2'1. Should it become necessary to center the shaft H with the shaft H, this may be accomplished by manipulation of the adjusting screws 33 toeffect a lateral movement of the shaft in one direction or the other, and if a vertical adjustment is required, this may be effected by loosening the lock screw 3! to release the stem 35. The yoke 31 may then be raised or lowered, as desired, and secured by tightening the lock screw 31.

From the foregoing it will be apparent that I have provided a grinding attachment which may be quickly installed in place of a meat chopper, and by providing separable shafting, a single grinding disk may be employed, or several disks and buffers may be utilized, permitting several grinding or polishing operations, as may be required in some instances.

While I have shown and described a certain preferred construction, this is by way of illustration only, for I am aware that changes may be made, and I therefore consider as my own, all such modifications in structure as fairly fall within the scope of the appended claims.

I claim:-

1. A grinder attachment for meat choppers and the like comprising in combination, a motor having a shaft and an open ended boss circumscribing the shaft, said shaft having a transverse slot across the end thereof, a grinder shaft having a bearing complemental to the boss and removably fixed therein, a bearing in the first named bearing and revolubly supporting the grinder shaft, a tongue on the grinder shaft engaged within the transverse slot of the motor shaft, a grinder disk on the grinding shaft, said last named shaft having a transverse tongue at the end thereof, a buffer and grinder shaft arranged in end to end relation with the grinder shaft and having a slot receiving the tongue, buffer and grinder disks on the buffer and a grinder shaft, and adjustable support means for the outer end of the last named shaft.

2. The structure of claim 1 wherein the support means is vertically and laterally adjustable.

3. A grinder attachment for meat choppers and the like comprising in combination, a motor having a shaft and an open ended boss circumscribing the shaft,'said shaft having a transverse slot across the end thereof, a grinder shaft having a bearing complemental to the boss and removably fixed therein, a bearing in the first named bearing and revolubly supporting the grinder shaft, a tongue on the grinder shaft engaged within the transverse slot of the motor shaft, a grinder disk on the grinding shaft, said last named shaft having a transverse tongue at the end thereof, a buffer and grinder shaft arranged in end to end relation with the grinder shaft and having a slot receiving the tongue, buffer and grinder disks on the bufier and grinder shaft, a bearing collar on the grinder and buffer shaft, a yoke member having laterally adjustable pivot pins journalled in opposed sides of the collar and said yoke member having a vertically adjustable stem member.

4. A grinder attachment for meat grinders and the like comprising in combination, a motor having a shaft, a second shaft, detachable coupling means between the shafts for end to end connection, a grinding disk on the motor shaft, 2. buffer and grinding disk on the second named shaft, an adjustable support means for the second named shaft, said last named shaft having pivotal connection with the support means whereby said shaft may be swung to a position clear of the motor shaft upon uncoupling of the shafts and a support for the second named shaft when in the latter position.

ANDREW J. KIRKLAND. 

